Error : unable to init server | First steps Oak-D

Aes0007

Good Day All,

I an having issues running depthai_demo.py on Pi4 running Ubuntu server 21.04 getting first; unable to init server followed by Can't initialize GTK backend in function 'cvInitSystem'

This is what i did:

I reinstalled Ubuntu 20.04 (64 bit)
Followed the first step instructions, it went through no error, but then I launched the demo script and got "no module named CV2"

Installed open cv via sudo apt-get install python-opencv
Launch the demo below and got the output below: Please advise/help.

_**Using depthai module from:  /home/ubuntu/.local/lib/python3.9/site-packages/depthai.cpython-39-aarch64-linux-gnu.so
Depthai version installed:  2.10.0.0.dev+7a0749a61597c086c5fd6e579618ae33accec8df
Available devices:
[0] 14442C10C18FBFD200 [X_LINK_UNBOOTED]
USB Connection speed: UsbSpeed.SUPER
Unable to init server: Could not connect: Connection refused
Traceback (most recent call last):
  File "/home/ubuntu/depthai/depthai_demo.py", line 235, in <module>
    pv.createQueues(device, createQueueCallback)
  File "/home/ubuntu/depthai/depthai_sdk/src/depthai_sdk/managers/preview_manager.py", line 73, in createQueues
    cv2.namedWindow(name)
cv2.error: OpenCV(4.5.1) ../modules/highgui/src/window_gtk.cpp:624: error: (-2:Unspecified error) Can't initialize GTK backend in function 'cvInitSystem'**_

Mojo

Hi @Aes0007,
it's strange that you get the "no module named CV2" error, did you install the requirements with the following command: python3 install_requirements.py ?